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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60e41d7fc01cda7ecd632fe4f513233c47f04435df66877af96acdd90625efad' 
  AND token = 'RDcR+NgsQ+AjsEUGqUDC6q/TK3tKCRYh4356EdEJKKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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