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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd459dd374c4545680e914d28b79d9a1c16c10aee9a9b2f6960d42eb1f6e57298' 
  AND token = 'P7ImkYFs6blb9gCi2m1XIeMmsJsvZF/7XzqULpuaMNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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