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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '26e1e7db1ed04cbb833c63db6a50922736039ca1321d72aa94378b7216ce32be' 
  AND token = 'W2ZFt008Ga2sKONBDauRD34nHdhEQ8d1Qv7QXojyjuM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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