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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60fa595af1702240982a48be8493ec2826ebd6d494dbe0614064b2ad0fb00152' 
  AND token = '6e9mbo3o+Z6gKhJWvbPWRXGPQVrXIM0JiyE8PNn/abs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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