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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '00a5e65c4b05a9bd0b4521537a23232db28188f7fb57e7047a25b799fdd4d868' 
  AND token = '25O6tIKzdSmU6YIEpUYk4n160Zi7gt65lcI5RrJZxCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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