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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f20fef464ce4baa325666401e714ceb0499de0f59e9cc0c13f5c351ea68ec7c9' 
  AND token = 'X2SywEp5gsk8EriQ6eH9/T9i9sVUHtGQ9ZMReY8NVRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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