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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4540957d3a0b58e2dc6070f2305942a79a34eb24aca09a24e4ff12b09ea0a7db' 
  AND token = 'fggqlbEJnqoPAQEIQy3ju5vPp9vLSciomjQf2RQiB4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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