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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5ae6e5317adbcfb67cad62cd99cc7b0fdd633bd9b2b8b1f56b5e490f979fb6c' 
  AND token = 'tauuIgzfHFH030QYk+f13YGLUNxep4zqYe1gW2jNEMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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