Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '363395506b3e0988c52e48173153cf791ba4e54b696f5f983bf6170a3e4f2aa1' 
  AND token = 'Ovt/M8BlJi5rV3Efzgf8nyWsjxNkiovWubcoK3RhqaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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