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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f88b18b9b5a79884d5651bf629be72a9df937b79201800e297605c0e4486101' 
  AND token = 'wbIo+gKI3pvaVuzncGpb3TSEZOt49/joJpW4SeR63Ns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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