Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c10ab1aab5685a240ec8058064d699d3d362b0fed6c7a4f38390a23042e482c5' 
  AND token = 'PtiMr1RL4cuBX3tsw/z9cRQNRHUSeEQJVtvNaH3dG8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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