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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0c8580e2262a297bf523f822e4b60194c6aea65ee83a390c909c91fa97ce0a8c' 
  AND token = 'WVTCXCjTnZSro5v4YevBoBjcOAUH91ZfXImGQmJ4oOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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