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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f099c79d0828828cc0cfbacb47b6969411fe724debe5d626e0881bb8779e25d' 
  AND token = '00Sq0IyeOyyvnmH39as5TFZ1U5MYBLT75KfX7Xms1ts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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