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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3337b0c96db574e3e640e712dc20cb7bb8e28bc1d63ff0d3acb8779dd6cc677' 
  AND token = 'V1aUJnqUeU/wbo4XqF22xAHVMEmUZaSXYEwq/aR3gpw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}