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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05372a01a9b6d72c64fe04fa7d5e9051f61a8ad1b9b313c8c70dbf940f557eff' 
  AND token = 'LT86KWVZRmOLD6mDFwbrnX7Pp6hFyWvK8fqEbH1xu2E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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