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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1bf858dd2ec571062631a684f44196047cb5b9ea798ca2014ebb62d7692b8fb' 
  AND token = 'h+PIZ7fF8vKhU8IUmrr9w8u7Tww9WoqRnOWNcIRIvhM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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