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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd5fbcda8bd90fdd30ea5d2f7ab8bbbb0fc23767d90e57f20ccfb7cb226dfe5a5' 
  AND token = 'Kha6wKyFVj9hYaVRM+yIQ6QspseaDV1J3PG7q7xEzsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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