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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48aafe61f32dd5e23b9a228bffbd517c9729d27857038af90977d488f2a384b4' 
  AND token = 'FN9HRS7U6YkDSH7bnMVIXqiKOupB7UuGxUq3Cd8vxQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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