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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65d89a79cb6507aad42f0a530d9aa6387449cda9b6ea3c470a04a71b7c537ed7' 
  AND token = 'MPEswL4BCp+caFHQZQ6MaXWRdr2Y0JwXHKD93nML1Js=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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