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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '97e99bec706ea98ed06142445598e7e1090193f8e7f7c57c0bafe4344875592b' 
  AND token = 'ZeAATAUwyeywZfff/5JyqoIZKrtmxT65Y7sSdu8wK4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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