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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e0a9aa1971b494384663d76eb84e512a3de35025bb69f84d2ededf7ecbc3af0' 
  AND token = 'Y3sYdyew4/7eASFVSx5K9JJnEqD0ZSFdebO4Isw9IF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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