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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ebfab5a45973066e627bd2e6103b36491bbd3de34453e95bab36c6e2a0f095d6' 
  AND token = 'WUSd0QQFFak9j2F7bYdcOdwU0Yv10GnzgcGXe0KMkjc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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