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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56035240753ff8dcb5145c2a56a44e7479a15232d0f08cf2f3fa3aebd917e3d2' 
  AND token = 'k8tYcaYdR+estc0eU7xguScEbStvK+gqCnldPanlybs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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