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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5c1840d5705653f4a8b7a5268d13a060bc8f5e294f1ebf3a551874eb26fbe44' 
  AND token = 'vO/NJThmRan1joRdax1aiOgL6cdYO6zXi6M5qVl1q/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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