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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '07fc1f7beb2542b4cbbaaae83b8b2e04b67c199f9ff44b42dce2edc4c1dae383' 
  AND token = 'vuN/tiTVx5MmY7V+f+80RZVGUgyyno0wcsYkexnUAGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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