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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0f32544419149c49a6f42bf4a01b1cca41cdf0d81e4fe24a68c7c60a2bea9a00' 
  AND token = '0rf0SY1KjVfUWow8mZBj4E9H7JLcArQ3dkNF95iLpq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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