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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b009f8fa6e9bf5c124d53c8b89aab78b1166c776c8c9319cefb490ff5002c394' 
  AND token = 'lbx4TiRx7KdqSDhcJkoiocR7sU2X2t7uijRlP7aTvo0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.10815

JSON explain

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