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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f083ee90537ab7ac4d4f81d7ad90cb9a46a81cdb7d1b66f48c631f310a2874c6' 
  AND token = 'WV1sdVICOMKHQla8Pwf4laeWbkZx3GBA6H0l0UKj8EQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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