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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f54b17e34ed22e0e625a620b5a6e7ff17616ab8b51ecdc5c86d316143098f59a' 
  AND token = 'JUZhPYebqWIz0HDShyWDPUOskfv1m53Vzkdu5GcWofY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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