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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '230b17dc8e3493a2fb7393fb1787acee9006e695f67b90d65381c57b1882ce9f' 
  AND token = 'cKCG1KiEvMSnXMjIIo9nv6kgeICMtNwNnTJG0GhaFu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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