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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aca962aa9c3df8ad01a577d739225fbf53631fb3f3cd7ecab720c07880144bec' 
  AND token = 'n3G9BLdQzUNgWmdEyRwWPsGOfN7toZnE83uvZOTEyDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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