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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7199cde9341ef0e55e7d9d4b59b85a2724abf79d56b68169cf06a166b3783a28' 
  AND token = 'hA1Z7/7PdiykPlonlgEyGRRiOX5NK2gjszluAdWIFTk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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