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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1e26f094d0bbd593788a32893ff5447a6c2a7f167a02760f8de5b04b4599952e' 
  AND token = 'auk01SE+wBTwoRwoAg0gkuZT3RabFGahaJM7bznt+QI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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