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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5e26ac5d1a56541543fe2b39760152f4ea7c58ef277e9db02fd8496977f6e50' 
  AND token = 'hff533hBIT/3Fb4iJGUzWWTH46CIJnwEpIT7QjDbNxg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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