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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b29fa6c87408802c6b0a6b6de8b04e5ed56debd1e7bd220663318ab70c34f5b' 
  AND token = 'rJ+ryqp5HXVf65jX84u6L749AHiDaSFIvLYTVByVV50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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