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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '57f490b5f6ca751c47e9382bf3e5aa942d9ba311a3db3d540845386e526fd372' 
  AND token = '0Z2jvzsAW4neSTD7xoXTzCeFigoevToo3Fcfk9fwAFw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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