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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad95a31289ae44f2c5730af9059e73bb5e6c1b3c18ffbd285a9e0fe407fa2c0b' 
  AND token = 'QASzcv5bkxT48byLGj0qytSUbSQs4hOMFPzywlT7hTI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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