SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e97fe181c02ded0587386554d80792662b9787d69f3ee5d184dd1e4d21188fb4' 
  AND token = 'lGqCZHgF0Ua6YzX/8xHzOnH+VRil3OXpo61e4cmwjC0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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