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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0095d340bbedcc51676611cf304db9c31ddfb8c3427e494fba43144e104a0bf4' 
  AND token = 'kzKodmjyPVn08+m2xGJQLbu9ErFIe5QXmCwP2TVDrHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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