Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3abfc4034f2a3da9f2b7dd7461087b5757422da4bdb4e1adaf1f35bc486d4da' 
  AND token = '+WFd8c1Fjv7Lug4CElLt4uo3DEtFRtyzwRbvR115PZg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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