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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e5580582ad361a3dfc44c4f3dd45416460d6aaa2a95e04797fcb2fe3d4dd00e3' 
  AND token = 'Tof5Vc04wjDFssImGDUU6hNG/nZWWjebOPtOyyW+j8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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