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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d4bf45a7518073cb42c0fd877705c015268c2c818b8c84980daf1cb355f6f70' 
  AND token = 'OyOQSLa7ZcX4aFU0IJIN1QAZ40+NmAwrZGclicz+fos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}