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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87ea1b0272e96e63d5448689c0f02e493614a0a77ffc5bae19cdd68a0d895d71' 
  AND token = 'u5ikzmT0HuBf8MmnJPfS+0EA2e0TBEWXqKDyGcdEIKI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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