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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1745509c7101f2ea8e2fd2b89e04b60161c34d9050be261ce124cd4cf0c1ddff' 
  AND token = 'yd12M6SMOaLm8WQFY4/oDl+ztYCjHDAFlpfqeP7wV4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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