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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4d5177bbfd4e8b1b802e99eebef4ca8e1ae87c556f184212841cf366cc85cc1' 
  AND token = '1BUx6oszp0R0wG5i+Y1vqZGvucW82WIGzW8x9zuesbI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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