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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5859b5ec7bf72bc7e311c23ef35c1e408a46814f383fc4d2a38f3ea798741f2' 
  AND token = '/wk/ZEOeek5/IbT2ZlrDdllExjWF3NhY/o1FR6FHXZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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