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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc989c7925c714056ae021888048baa5396700d48697c97fa39b55165b27f60b' 
  AND token = 'X9TY4F0wWptiJdENUykRbYQwy0vsVILvkiLogkH63XE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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