Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'faa89fd2c156e14f8c0eee127a7dbeed834ff2212ef8c970f0859a852f5ebc80' 
  AND token = 'BcRsjnGil66LHAXFohYB5SEs+qubPtxr5uGAJRISBXQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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