Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f793bfd81ee7a1092625cb67d1932c83882c917fc61df5c9614debd6fb98dc6c' 
  AND token = 'mY0d9RJoSLtHPg7gm0ACNHi1ULz3qqszeldQ6m3it70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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