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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c0419a783b2f8a0534896e4c9fa7b399bb65c58dcab32df71ed236724bdb37c' 
  AND token = '95b3ixzhvFtkbMT3nuFmt2u+GwAY0bcrlUJjemPu3Yw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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