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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12a4cb1522933682ee255e679d2f16e1ba5ed3e15eac361fb5568ed8b28f3c26' 
  AND token = 'OVxfas8XxScMipTgbr2p/E/NonNxYeb5HS7J0JAU/SU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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