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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fa32405a2889d03f331706666780a242f9a68aae9aa58412ef69ee11661f655f' 
  AND token = 'PwgRde51DQV1P8w3twLrIh5IN5dXyCqhNpMpOFTR7yw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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