Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccdd04dbacd46660f7d981f90b5afdfd191e06177dd4ea77027fbd9d0eca1f81' 
  AND token = 'bcctvYvjsxNhFDQUQ2LdCEOD3eZrCF9TGxhvkjapCpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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