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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5fc0bb399ef0f0badb90d74f9047557c9194f1195e821c30648351873bdd7d2c' 
  AND token = '2TkEaqrFD3o4qaO4RrOXoLFPdw9q4w1NQrfOtO8hFxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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