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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2244974748d019ad21d247baa3ad72f35a8fc3ac4d075a907f90ef8cb90106b4' 
  AND token = '8Dc4jx7TV76sg7fTFFbsbWfuCVh9aZX8YRsmaVSWVLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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