Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e996967e269b05a7734e33dd9d5a5d43489620cf89f65cb0a22cc0987b26ba73' 
  AND token = 'nHeDAOWypJ5NVixDf/wa32piZNsaU40QIQ6nyBX2aRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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