Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf508a67d3ba18840a30cab51da830d689acb38e910e52c21bdb386bdd5af9ef' 
  AND token = 'Be0Mch7i6R0WP3a+Ff5DB3zCUR8BozemCctMSV74UL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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