Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c1cca84cc6ecb6ec0e406cdce2020de16485a526d6b799ed5ebc1efb5135cd5' 
  AND token = '7Nfuo3X3aJB0o5HS11+tzHGznKvTwxDHNt9BXrWQLe4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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